1.Log in to the game by signing up here
2.Click the button in the upper right corner and select "Promotion Codes"
3.Enter your Code and click the "Unlock" button. you will now receive a notification message on the left side of the screen that invites you to receive your unlocked item.
4.Click the icon next to the notification message and select "Read more". another window will open Follow the on-screen instructions to receive and equip your special promotion item!